Question 1

Which of the following compounds is aromatic?

Accepted Answer

A)   ethane
B)   cyclobutadiene
C)   benzene
D)   cyclooctatetraeneE) B) and C)
F) A) and B)

Question 2

What is the hybridization of the oxygen atom of furan?

Accepted Answer

A)   s
B)   sp
C)   sp2
D)   sp3E) C) and D)
F) None of the above

Question 3

What is the major organic product obtained from the following reaction?

Accepted Answer

A)   1
B)   2
C)   3
D)   4E) All of the above
F) A) and D)

Question 4

Which of the following has the compounds shown in the correct order of decreasing acidity (i.e., more acidic > less acidic) ?  less acidic) ?   A)  1 > 2 > 3 B)  2 > 1 > 3 C)  3 > 2 > 1 D)  1 > 3 > 2" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1 > 2 > 3
B)   2 > 1 > 3
C)   3 > 2 > 1
D)   1 > 3 > 2E) B) and C)
F) A) and C)

Question 5

What is the IUPAC name of the following compound?

Accepted Answer

A)   2,4-dibromotoluene
B)   2,4-dibromophenol
C)   2,4-dibromohydroxybenzene
D)   4,6-dibromophenolE) B) and D)
F) A) and D)

Question 6

What is the IUPAC name of the following compound?

Accepted Answer

A)   1-bromo-2-fluoro-4-toluene
B)   4-bromo-2-fluorotoluene
C)   2-bromo-4-fluorophenol
D)   4-bromo-2-fluoroxyleneE) B) and C)
F) C) and D)

Question 7

Consider the following structure. 
-This structure contains ____ π electrons.

Accepted Answer

The answer of Consider the following structure. 
-This structure contains...

Question 8

Phenols are stronger acids than alcohols because of the resonance stabilization of alkoxide ions.

Accepted Answer

A) True 
 B)False

Question 9

What are the relative positions of the substituents in the following structure?

Accepted Answer

A)   anti
B)   meta
C)   ortho
D)   paraE) None of the above
F) B) and C)

Question 10

Assuming that the sulfur atom is sp2-hybridized, there are _____ π-electrons in the sulfathiazole ring.

Accepted Answer

Question 11

Which of the following has the compounds shown in the correct order of decreasing acidity (i.e., more acidic > less acidic) ?  less acidic) ?   A)  1 > 2 > 3 B)  2 > 1 > 3 C)  3 > 2 > 1 D)  1 > 3 > 2" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1 > 2 > 3
B)   2 > 1 > 3
C)   3 > 2 > 1
D)   1 > 3 > 2E) A) and B)
F) A) and C)

Question 12

Provide a brief explanation of why the cyclopentadienyl anion (below) is aromatic. Your answer should identify the hybridization of each carbon atom and account for which electrons are in the pi system.

Accepted Answer

The all five carbons are sp² hybridized. ...

Question 13

How many p orbital electrons are present in cyclopentadienyl anion?

Accepted Answer

A)   4
B)   6
C)   7
D)   8E) None of the above
F) C) and D)

Question 14

What is the correct assignment of the names of the following heterocycles?

Accepted Answer

A)   1 = pyrrole; 2 = thiophene; 3 = pyridine
B)   1 = thiophene; 2 = furan; 3 = pyrrole
C)   1 = furan; 2 = pyrrole; 3 = thiophene
D)   1 = furan; 2 = thiophene; 3 = pyrroleE) B) and D)
F) A) and C)

Question 15

What is the best choice of reagent to achieve the following reaction? 2, CCl4 B)  HBr, H2O C)  Br2, light D)  NaBr" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   Br2, CCl4
B)   HBr, H2O
C)   Br2, light
D)   NaBrE) C) and D)
F) A) and D)

Question 16

What are the relative positions of the substituents in the following structure?

Accepted Answer

A)   anti
B)   meta
C)   ortho
D)   paraE) A) and B)
F) A) and C)

Question 17

What is the best choice of reagent to achieve the following reaction? 2SO4 B)  NaOH, H2O C)  K2Cr2O7, H2SO4 D)  H2/Pd" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   H2SO4
B)   NaOH, H2O
C)   K2Cr2O7, H2SO4
D)   H2/PdE) B) and C)
F) C) and D)

Question 18

Why are nitrophenols more acidic than phenols?

Accepted Answer

Nitro phenols are more acidic than pheno...

Question 19

Which of the following has the compounds shown in the correct order of decreasing acidity (i.e., more acidic > less acidic) ?  less acidic) ?   A)  1 > 2 > 3 B)  2 > 3 > 1 C)  3 > 2 > 1 D)  2 > 1 > 3" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1 > 2 > 3
B)   2 > 3 > 1
C)   3 > 2 > 1
D)   2 > 1 > 3E) A) and B)
F) None of the above

Question 20

Which of the following is not true about [18]annulene? 1H NMR spectrum D)  [18]annulene has 18 pi bonds" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   [18]annulene is planar
B)   [18]annulene is aromatic
C)   [18]annulene gives one peak in the 1H NMR spectrum
D)   [18]annulene has 18 pi bondsE) A) and D)
F) A) and B)

Exam 21: Benzene and the Concept of Aromaticity

Which of the following has the compounds shown in the correct order of decreasing acidity (i.e., more acidic > less acidic) ?

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What is the best choice of reagent to achieve the following reaction?

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Which of the following compounds is aromatic?

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Provide a brief explanation of why the cyclopentadienyl anion (below) is aromatic. Your answer should identify the hybridization of each carbon atom and account for which electrons are in the pi system.

Correct AnswerverifiedThe all five carbons are sp2 hybridized. ...View AnswerShow Answer

Assuming that the sulfur atom is sp2-hybridized, there are _____ π-electrons in the sulfathiazole ring.

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Which of the following is not true about [18]annulene?

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What is the IUPAC name of the following compound?

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What is the best choice of reagent to achieve the following reaction?

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Which of the following has the compounds shown in the correct order of decreasing acidity (i.e., more acidic > less acidic) ?

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How many p orbital electrons are present in cyclopentadienyl anion?

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What is the major organic product obtained from the following reaction?

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What is the correct assignment of the names of the following heterocycles?

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What is the IUPAC name of the following compound?

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What is the hybridization of the oxygen atom of furan?

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Why are nitrophenols more acidic than phenols?

Correct AnswerverifiedNitro phenols are more acidic than pheno...View AnswerShow Answer

Which of the following has the compounds shown in the correct order of decreasing acidity (i.e., more acidic > less acidic) ?

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What are the relative positions of the substituents in the following structure?

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What are the relative positions of the substituents in the following structure?

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Consider the following structure. -This structure contains ____ π electrons.

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Phenols are stronger acids than alcohols because of the resonance stabilization of alkoxide ions.

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The all five carbons are sp² hybridized. ...
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Assuming that the sulfur atom is sp²-hybridized, there are _____ π-electrons in the sulfathiazole ring.

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Nitro phenols are more acidic than pheno...
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